Name the three groups of muscles constituting the intrinsic muscles of the hand. Briefly describe the structure and function of each of these groups

What will be an ideal response


1. Thenar: four muscles that act on the thumb and form the lateral rounded contour of the palm. 2. Hypothenar: three muscles that act on the little finger and form the medial rounded contour of the palm. 3. Intermediate: 12 muscles acting on all digits except the thumb; subgrouped as lumbricals, palmar interossei, and dorsal interossei, and located between metacarpals; needed for all phalangeal movements.

Anatomy & Physiology

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The ________ is composed of circularly arranged layers of smooth muscle cells.

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